Which one of the following mineral is the main source of Boron in soils
Tourmaline is the main source of boron; Pyrolusite is a mineral consisting essentially of manganese dioxide (MnO2) and is important as an ore of manganese; Magnetite is a mineral whose primary component is an iron oxide that contains equal amounts of iron(II) and iron(III); Muscovite is the most common mineral of the mica family.
The average of first five multiples of 3 is
Average age of company A is 28 years and average age of both companies A and B is 20 years. If the ratio of number of employees in company A and B is 3:...
A number is such that when it is multiplied by 3, it gives another number which is as much above from 240 as the original number (itself) is below 240. ...
The average weight of 4 persons is 46 kg. The heaviest person’s weight is 28 kg more than the lightest person’s weight. If the average weight of the...
Find the average of all the numbers between 9 and 31, which are divisible by 5?
The average of 19 numbers is 15.The average of first 9 numbers are12 and that of the last 9 numbers are15. What will be the 19th number?
Average age of company A is 21 years and average age of both companies A and B is 13 years. If the ratio of number of employees in company A and B is 3:...
The average expenditure of a man for the first 6 month is Rs.6000 and for the next 6 months is Rs.8000. If he saves 12000 in that year then find his ave...
In a class of 50 students, the girls are 76%. The average weight of boys is 62 kg and that of girls is 58 kg. What is the average weight (in kg) of whol...
The average age of 10 men is increased by 2 years when two of them whose age are 24 and 26 years replaced by two new men. The average age of the two new...